The Importance of Surgical Staging in Women With Uterine Serous Carcinoma: Experience in a Single Institution Reveals a Survival Benefit

Abstract

ObjectiveTo assess the appropriate extent of surgical staging in women with clinically early stage uterine serous carcinoma (USC). MethodsWe conducted a single-institution retrospective cohort study of all women with USC between 2007 and 2012. Treatment practices, outcomes, and factors affecting survival were analyzed using univariate and multivariate analysis. ResultsEighty-four patients were identified, 76 of whom were included in the analysis. Preoperative pathology correctly identified USC in 73.3% of cases. Surgical stage distribution was 44.7% stage I, 7.9% stage II, 31.6% stage III, and 15.8% stage IV. Women thought to have early stage disease preoperatively encompassed 84.2% (64) of the cohort. Fifty-two (81.3%) of these women with clinically early stage disease had complete surgical staging. Thirty-four (53.1%) were determined to have surgical stage I, and the remaining 30 (46.9%) had occult advanced stage disease. Median follow-up was 43.2 months. Univariate analysis found a significant increase in progression-free survival and overall survival for women with clinically early stage disease with positive lymphovascular space invasion (P < 0.001 and P = 0.002, respectively), positive peritoneal cytology (P = 0.022 and P = 0.04, respectively), early stage (P < 0.001 and P = 0.004, respectively), and elevated serum CA125 at diagnosis (P = 0.003 and P = 0.001, respectively). On multivariate analysis, early stage (hazard ratio [HR] 9.87; 95% CI 2.79 to 34.92, P < 0.001) and complete surgical staging (HR 2.96; 95% CI 1.05 to 8.37, P = 0.040) were associated with prolonged progression-free survival, while overall survival was not affected by complete surgical staging (HR 1.92; 95% CI 0.64 to 5.76, P = 0.79). ConclusionComplete surgical staging prolongs the progression-free survival of women with clinical early-stage uterine serous cancer. Although this does not extend to overall survival, this enables patients to have an improved quality of life with a longer interval without the burden of disease.